Word

五十路

いそじ
age fifty; one's fifties
Word

五代十国

ごだいじっこく
Five Dynasties and Ten Kingdoms (in Chinese history)
Word

五風十雨

ごふうじゅうう
seasonable rains and winds; halcyon weather; halcyon times of peace
Word

五十肩

ごじゅうかた
stiff shoulders (owing to age); frozen shoulder
Word

五十音図

ごじゅうおんず
the Japanese syllabary table
Word

再十両

さいじゅうりょう
wrestler re-promoted to juryo division
Word

三十六計

さんじゅうろっけい
the 36 (ancient Chinese military) strategies (of which the last resort was said to be beating a retreat)
Word

三十

num
さんじゅう、みそ
thirty
Word

三十戸

さんじっこ
thirty houses
Word

五十

ごじゅう、いそ、い
fifty